If installing for the first time:
- Make sure you have DirectX 9.0c installed already.
- To install, extract the files and run the setup.exe and follow the instructions. This will also install Microsoft .Net 2.0 framework if you do not already have it (except under Vista, it skips this part).

If upgrading from version 0.5:
- Backup your project files (usually found under "C:\Program Files\BobsTrackBuilder\My Projects").
- Uninstall Bobs Track Builder.
- Extract the files from the zip below and run the setup.exe to install the new version.
- Richard Burns Rally users will also need the new plugin - see documentation (press F1).

If upgrading from version 0.4.2.3 and you wish to upgrade your existing projects:
- Copy your current BobsTrackBuilder folder to BTBOLD.
- Uninstall Bobs Track Builder. Delete the BobsTrackBuilder folder so that only your BTBOLD folder exists.
- Extract the files from the zip below and run the setup.exe to install the new version.
- Richard Burns Rally users will also need the new plugin - see documentation (press F1).

You can now run either the BTBOLD\BobsTrackBuilder.exe or the new one.

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also, for RBR :

Exporting to Richard Burns Rally

Thanks to black f and his hard work I am now able to offer export directly to Richard Burns Rally including all the new shaders now used by BTB. Some preparation is required before export begins:

Make sure you have installed the Richard burns Rally patch 1.02.

Copy the following files and folders from BTB into your Richard Burns Rally folder, and overwrite if prompted.

If running for the first time, locate your Richard Burns Rally folder.

Enter a Description and Folder name for your track.

Select a Tyre Choice.

Click Export.

If you have a newly installed version of Richard Burns Rally, make sure you have run the game and completed a track first before attempting one of the BTB-generated tracks.
If you have an old graphics card, that does not support shader 3.0, you will need to tick the Disable Instancing in order for the object to draw properly.
If you want to record your new track with Fraps in RBR, you need to change the record button in Fraps, to F5; F9 is used by the plugin to make the track disappear.

It looks like you have a corrupt install and/or a file is missing, did you try uninstalling what you have and reinstalling the latest version?

did you accidentally download just the patch instead of the full install?

try:

- Copy your current C:\Program Files\BobsTrackBuilder folder to C:\Program Files\BTBOLD.
- Uninstall Bobs Track Builder. Delete the BobsTrackBuilder folder so that only your BTBOLD folder exists.
- Extract the files from the zip below and run the setup.exe to install the new version.

Looks like the same as I had, fixed it with installing newest DirectX9.0c. I have noticed there are different versions of dx9.0c don't know why. I have XP so I don't know about Vista, doesn't it come with dx10? try the newest dx10...